These days, the headphone biz is hot. The speaker biz? Not as hot. So it’s no surprise that every major speaker company is either launching a headphone line or thinking about it. And why not? They’re experts in developing, manufacturing, and marketing audio products. How hard could it be for them to launch a line of headphones?

When I got the press release for the new InTune in-ear headphones from Fuse, it made me think: How is any particular genre of music supposed to sound? And does it already sound that way, or do you have to do something to it to make it sound like it’s supposed to?

The InTune headphones inspired this question because they’re available in four varieties, each tuned for a certain type of music: red for rap and hip-hop, orange for rock, blues and country; blue for jazz and classical; and green for pop and easy listening.

If I review more speakers like the Gallo Acoustics Nucleus Reference Strada, my Office Depot bill will skyrocket. Within the first 2 minutes of listening to this speaker, I filled a page and a half of my lab notebook with verbiage - and the torrential scribbling continued for days, consuming paper faster than a schnauzer snarfs up Snausages.

What might have been the most anticipated speaker launch of CES definitely delivered when GoldenEar demoed its new Triton One flagship tower speaker. Walking around the Venetian Hotel in Las Vegas, I kept hearing showgoers rave about the Triton One's sound -- no big surprise, considering that speakers like the Triton Seven have gotten such glowing reviews in Sound & Vision and other publications.

ANY AUDIOPHILE CAN RECOGNIZE a pair of Grado headphones from 50 feet away. The distinctive, old-school leather band and earpieces mounted on sliding rods give them a World War II vibe. But audiophiles love them for their sound, not their looks.

LEDs have risen from their original occupation as humble indicator lamps to serving as the light source for some of today's most advanced TVs. Electronics engineers prize the LED for its brightness and cool-running efficiency. Environmentalists and utility companies tout its low power consumption. Videophiles are warming to it for the performance enhancements it facilitates.

Nobody realized the potential of digital TV. Sure, 15 years ago, tech pundits raved about the possibilities of multicasting, and A/V buffs salivated over the thought of high-definition images. But digital technology has affected the world of television in many more important ways besides those.

EVERYWHERE YOU GO, it’s so easy to listen to music, thanks to smartphones, tablets, and MP3 players. But it’s kind of a bummer that millions of people now hear most of their music through earbuds with drivers smaller than a dime.

We seem to be going through a mini-renaissance in the hallowed tradition of the American hi-fi show, what with this year's burgeoning crop of existing shows and welcome upstarts. Yet Southern California audiophiles, despite living in what some would consider the nexus of the audio industry, haven't been treated to a good show for years.